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prove coversion speed

This commit is contained in:
tickduan 2021-07-12 13:32:00 +08:00
parent 60e056a2cb
commit 3031aeb9dd
1 changed files with 28 additions and 42 deletions
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70
deps/SZ/sz/src/ByteToolkit.c vendored
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@ -14,25 +14,12 @@
INLINE int bytesToInt_bigEndian(unsigned char* bytes) INLINE int bytesToInt_bigEndian(unsigned char* bytes)
{ {
int temp = 0; int res;
int res = 0; unsigned char* des = (unsigned char*)&res;
des[0] = bytes[3];
res <<= 8; des[1] = bytes[2];
temp = bytes[0] & 0xff; des[2] = bytes[1];
res |= temp; des[3] = bytes[0];
res <<= 8;
temp = bytes[1] & 0xff;
res |= temp;
res <<= 8;
temp = bytes[2] & 0xff;
res |= temp;
res <<= 8;
temp = bytes[3] & 0xff;
res |= temp;
return res; return res;
} }
@ -42,20 +29,18 @@ INLINE int bytesToInt_bigEndian(unsigned char* bytes)
* */ * */
INLINE void intToBytes_bigEndian(unsigned char *b, unsigned int num) INLINE void intToBytes_bigEndian(unsigned char *b, unsigned int num)
{ {
b[0] = (unsigned char)(num >> 24); unsigned char* sou =(unsigned char*)&num;
b[1] = (unsigned char)(num >> 16); b[0] = sou[3];
b[2] = (unsigned char)(num >> 8); b[1] = sou[2];
b[3] = (unsigned char)(num); b[2] = sou[1];
b[3] = sou[0];
//note: num >> xxx already considered endian_type...
//if(dataEndianType==LITTLE_ENDIAN_DATA)
// symTransform_4bytes(*b); //change to BIG_ENDIAN_DATA
} }
/** /**
* @endianType: refers to the endian_type of unsigned char* b. * @endianType: refers to the endian_type of unsigned char* b.
* */ * */
INLINE long bytesToLong_bigEndian(unsigned char* b) { INLINE long bytesToLong_bigEndian(unsigned char* b) {
long temp = 0; long temp = 0;
long res = 0; long res = 0;
@ -92,25 +77,29 @@ INLINE long bytesToLong_bigEndian(unsigned char* b) {
res |= temp; res |= temp;
return res; return res;
} }
INLINE void longToBytes_bigEndian(unsigned char *b, unsigned long num) INLINE void longToBytes_bigEndian(unsigned char *b, long num)
{ {
// arm32 unsigned char* sou = (unsigned char*)&num;
#if defined(_TD_LINUX_64) || defined(_TD_ARM_64) || defined(_TD_DARWIN_64) #if defined(_TD_LINUX_64) || defined(_TD_ARM_64) || defined(_TD_DARWIN_64)
b[0] = (unsigned char)(num>>56); // 8 bytes
b[1] = (unsigned char)(num>>48); b[7] = sou[0];
b[2] = (unsigned char)(num>>40); b[6] = sou[1];
b[3] = (unsigned char)(num>>32); b[5] = sou[2];
b[4] = sou[3];
b[3] = sou[4];
b[2] = sou[5];
b[1] = sou[6];
b[0] = sou[7];
#else #else
memset(b, 0, 4); memset(b, 0, 4);
b[7] = sou[0];
b[6] = sou[1];
b[5] = sou[2];
b[4] = sou[3];
#endif #endif
b[4] = (unsigned char)(num>>24);
b[5] = (unsigned char)(num>>16);
b[6] = (unsigned char)(num>>8);
b[7] = (unsigned char)(num);
// if(dataEndianType==LITTLE_ENDIAN_DATA)
// symTransform_8bytes(*b);
} }
//TODO: debug: lfBuf.lvalue could be actually little_endian.... //TODO: debug: lfBuf.lvalue could be actually little_endian....
@ -135,9 +124,6 @@ INLINE short getPrecisionReqLength_float(float precision)
int expValue = (ivalue & 0x7F800000) >> 23; int expValue = (ivalue & 0x7F800000) >> 23;
expValue -= 127; expValue -= 127;
// unsigned char the1stManBit = (unsigned char)((ivalue & 0x00400000) >> 22);
// if(the1stManBit==1)
// expValue--;
return (short)expValue; return (short)expValue;
} }